Hi,
Going thru the forum let me know that some health data aren’t available for face designers (so why give them a tool like WFS if they have to be one or two hands tied in their back ?) but I don’t see why steps count is when activity time & calories aren’t (unless I’ve missed something).
They are available, they are out there…but sharing information here doesn’t really seem to be as much of a thing as it is on the “Kumbaya” platform. 
Here’s what I use for step distance:
KM: ((round(([SC]*0.0762)))/100)
Miles: ((round(([SC]*0.0476)))/100)
For calories burned: KCAL: (round(([SC]/20)))
It would be best to rely on complications (which you can customise, especially in XML). Heuristics based only on step-count won’t take the user’s stride length into account, or activity that doesn’t strictly correlate with steps (eg, cycling, swimming, or even running cf. walking).
Eventually I might work up to something like that when my coding abilities are remotely close to that level. I know it’s not accurate and it’s just eye-candy really. 
It gives us a Number we can compare to the previous Day . There is a vast difference in Data for Fun and Scientific instruments . The price is very different . I looked at the apps that say thier Kcal county is accurate . You have to log what you eat and updatete the Biometrics regularly . The nice thing about WFS is we can engage the Step goal and give some sort of notification then . If you are still intrested @parisienne17 many include life Calories . Those used by your Body to stay alive . I base that on 1800 per day and .21 calories per step .
Something like that . Mine is a “Kumbaya” Formula but it can be ported easily .
How do you make a “style” out of these 2?
Sorry . Which 2 ? I am quite certain that my Brain is Older than my Body.
I was talking to @MergeLabs
Oh hey, yeah it’s actually something using transparent images and swapping one for another or using masking to toggle between one version of something to another - in this case, KM - Miles or something like AOD on/off. I really can’t articulate what I mean as it is a trick that someone taught me a while back (a true legend in the game).
I found this tutorial from @Knightwing which looks pretty comprehensive. Check it out.
yes, the OP was asking about how to swap styles.
I see, posted here so easy for op to find. Long time no see anywayz
Not active here anymore
I am just trying to help, not much of that going around here these days. 